CN204344265U - Booster lubricating system and motor - Google Patents

Abstract

The utility model discloses a supercharger lubricating system and an engine. The supercharger lubricating system comprises a main oil passage (10), a supercharger (11) and a crankcase (12), wherein the supercharger (11 ) is connected to the main oil passage, wherein the supercharger lubrication system also includes an auxiliary oil pump (20) and a reversing valve (30), and the oil outlet of the supercharger is connected to the The oil inlet port of the reversing valve (30), the first oil outlet (31) of the reversing valve is connected to the crankcase, and the second oil outlet (32) is connected to the crankcase through the auxiliary oil pump. Describe the main oil passage. Therefore, the reversing valve is used to control the flow direction of the oil. When the engine is working normally, the oil outlet of the supercharger is connected to the crankcase through the reversing valve. When the engine is stopped, the oil outlet of the supercharger is connected through the reversing valve The supercharger is connected with the main oil passage, and the auxiliary oil pump is used to drive oil to circulate in a closed circuit to lubricate and cool the supercharger.

Description

Supercharger lubrication system and engine

technical field

The utility model relates to the technical field of supercharger lubrication in engines, in particular to a supercharger lubrication system and an engine.

Background technique

The supercharger compresses the air before entering the engine cylinder to increase the density of the air, so that more air can be filled into the engine cylinder, thereby increasing engine power, reducing fuel consumption, and improving emissions, so it is widely used in engines in the power system. Due to the high speed of the supercharger rotor, the supercharger must be lubricated and cooled.

At present, the cooling circuit of the supercharger on the diesel engine is to take oil from the main oil circuit, and return the oil directly to the crankcase. Specifically, as shown in Figure 1, the existing turbocharger lubrication system only has a one-way lubricating oil path branched from the main oil gallery 10, and the supercharger 11 is respectively connected to the one-way lubricating oil path. And the crankcase 12, when the engine stops, the oil in the main oil passage 10 stops flowing, and the rotor of the supercharger 11 will continue to run due to inertia, so the supercharger will have poor lubrication, and even the supercharger Partial internal overheating, burning the supercharger shaft and bearings, reducing the service life of the supercharger and even the entire engine. Or when the supercharger is to be cooled during normal shutdown, the engine needs to be idle for a long enough time, which will waste a lot of energy.

Utility model content

An object of the present invention is to provide a supercharger lubrication system, which can continue to lubricate and cool the supercharger after the engine stops.

Another object of the utility model is to provide an engine, which includes the supercharger lubrication system provided by the utility model.

According to one aspect of the present invention, the present invention provides a supercharger lubrication system, including a main oil passage, a supercharger and a crankcase, wherein the oil inlet of the supercharger is connected to the main oil passage, Wherein, the supercharger lubrication system also includes an auxiliary oil pump and a reversing valve, the oil outlet of the supercharger is connected to the oil inlet of the reversing valve, and the first oil outlet of the reversing valve The second oil outlet is connected to the crankcase, and the second oil outlet is connected to the main oil passage through the auxiliary oil pump.

Preferably, the auxiliary oil pump is driven by an electric motor.

Preferably, the reversing valve is a solenoid valve.

Preferably, the motor and the reversing valve are synchronously controlled by an engine control unit.

Preferably, the supercharger lubrication system further includes a backup oil pump and an oil pressure sensor, the oil pressure sensor is located between the reversing valve and the auxiliary oil pump, and the third oil outlet of the reversing valve The backup oil pump is connected to the main oil passage, and when the oil pressure monitored by the oil pressure sensor is higher than a predetermined value, the backup oil pump is turned on.

Preferably, the auxiliary oil pump and the standby oil pump are respectively driven by electric motors.

Preferably, the reversing valve is a solenoid valve.

Preferably, the motor and the reversing valve are synchronously controlled by an engine control unit.

According to another aspect of the present invention, a vehicle is provided, which includes the supercharger lubricating system provided according to the present invention.

Through the above technical scheme, the flow direction of the engine oil is controlled by the reversing valve. When the engine is working normally, the oil outlet of the supercharger communicates with the crankcase through the reversing valve. When the engine stops, the oil outlet of the supercharger passes through the The reversing valve communicates with the supercharger and the main oil passage, and uses the auxiliary oil pump to drive oil to circulate in a closed circuit to lubricate and cool the supercharger.

Other features and advantages of the present utility model will be described in detail in the following specific embodiments.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, together with the following specific embodiments, are used to explain the utility model, but do not constitute a limitation to the utility model. In the attached picture:

Fig. 1 is the functional block diagram of existing turbocharger lubrication system;

Fig. 2 is the functional block diagram of the turbocharger lubrication system provided by the preferred embodiment of the present invention;

Fig. 3 is a structural principle diagram when the reversing valve in the supercharger lubrication system provided by the preferred embodiment of the present invention is in a shutdown state;

Fig. 4 is a functional block diagram of a supercharger lubrication system provided in a preferred embodiment of the present invention in working condition;

Fig. 5 is a functional block diagram of a turbocharger lubrication system in a shutdown state provided by a preferred embodiment of the present invention.

Fig. 6 is a functional block diagram when the supercharger lubrication system provided by another preferred embodiment of the present invention is in a shutdown state and the auxiliary oil pump is working normally;

Fig. 7 is a structural principle diagram of the reversing valve in the supercharger lubrication system provided by another preferred embodiment of the present invention when the auxiliary oil pump is working normally;

Fig. 8 is a functional block diagram when the lubricating system of the turbocharger provided by another preferred embodiment of the present invention is in a shutdown state and the auxiliary oil pump is blocked.

Explanation of reference signs

10 main oil passage 11 supercharger 12 crankcase

20 Auxiliary oil pump 21 Spare oil pump

30 Reversing valve 31 First oil outlet 32 Second oil outlet

33 The third oil outlet 40 Oil pressure sensor

Detailed ways

The specific embodiment of the utility model will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the utility model, and are not intended to limit the utility model.

It should be noted that the direction of the arrow in the drawings represents the flow direction of the engine oil.

In order to overcome the defects in the prior art, as shown in Figure 2 to Figure 5, the utility model provides a supercharger lubrication system, the supercharger lubrication system includes a main oil passage 10, a supercharger 11 and a crankcase 12 , wherein the oil inlet of the supercharger 11 is connected to the main oil gallery 10, wherein the supercharger lubrication system also includes an auxiliary oil pump 20 and a reversing valve 30, and the outlet of the supercharger 11 The oil port is connected to the oil inlet port of the reversing valve 30, the first oil outlet 31 of the reversing valve 30 is connected to the crankcase 12, and the second oil outlet 32 is connected to the auxiliary oil pump 20. to the main oil gallery 10.

Specifically, in this preferred embodiment, the reversing valve 30 may be a two-position three-way reversing valve, but the utility model is not limited thereto. Wherein the oil inlet of reversing valve 30 links to each other with the oil outlet of supercharger 11 all the time, and the first oil outlet 31 of reversing valve 30 and the second oil outlet 32 all can only have one to open under any circumstances , the other is closed, thereby selectively connecting the supercharger 11 with the crankcase 12 or the auxiliary oil pump 20 .

Therefore, when the engine is working normally, the first oil outlet 31 of the reversing valve 30 is opened, the second oil outlet 32 is closed, and the supercharger 11 communicates with the crankcase 12. At this time, as shown in Figure 4, the main oil passage 10 The oil in the engine flows through the supercharger 11 and directly flows back to the crankcase 12; when the engine is shut down in an emergency, the second oil outlet 32 of the solenoid valve is opened, the first oil outlet 31 is closed, and the supercharger 11 passes through the auxiliary machine The oil pump 20 is connected to the main oil passage 10. At this time, as shown in FIG. 5, the circuit where the supercharger 11 is located forms a complete closed lubricating oil circuit. Driven by the auxiliary oil pump 20 , the engine oil continues to circulate to lubricate and cool the supercharger 11 .

It should be noted that the oil inlet of the auxiliary oil pump 20 can be directly connected to the main oil passage 10, as shown in Figure 2, the oil inlet of the supercharger 11 and the oil inlet of the auxiliary oil pump 20 respectively directly communicate with the Main oil passage 10 to form a closed lubricating oil passage. At this time, when the engine is working normally, the machine oil on the main oil gallery 10 will flow from the two branches to the supercharger 11 and the auxiliary oil pump 20 respectively, and the machine oil flowing to the supercharger 11 will directly flow back to the crankcase 12, the oil flowing to the auxiliary oil pump 20 will be stored on the branch where the auxiliary oil pump 20 is located because the second oil outlet 32 is closed and the auxiliary oil pump 20 is not working, so that the engine After shutdown, the total amount of machine oil circulating in the entire supercharger lubricating system increases, which is more conducive to the lubrication and cooling of the supercharger 11 . In addition, the oil inlet of the auxiliary oil pump 20 is directly connected with the main oil passage 10, which can well adapt to the original line connection and the structure of the supercharger, and reduce the components as much as possible to save costs.

Of course, the oil inlet of the auxiliary oil pump 20 can also be indirectly communicated with the main oil passage 10, that is, the oil inlet of the auxiliary oil pump 20 is connected between the oil inlet of the supercharger 11 and the main oil passage 10, for This way should also belong to the protection scope of the present utility model.

Preferably, in order to facilitate the auxiliary oil pump 20 to drive the flow of oil after the engine stops, the auxiliary oil pump 20 is driven by a motor, that is, except for the engine oil pump, the oil is driven to flow from the crankcase 12 to the main oil passage 10 for each engine. In addition to lubricating the parts that need to be lubricated, the auxiliary oil pump 20 on the supercharger lubrication system provided by the utility model is driven separately by another motor, so that after the engine stops, the additional motor can drive the auxiliary oil pump 20 to work , and then promote the circulation of engine oil in the closed lubricating oil circuit to cool and lubricate the supercharger 11 .

Further, in order to quickly switch the working position of the electromagnetic valve to control the opening and closing of the first oil outlet 31 and the second oil outlet 32, the reversing valve 30 is an electromagnetic valve. Therefore, the switch of the first oil outlet 31 and the second oil outlet 32 can be conveniently switched through the reversing valve 30 .

Furthermore, in order to effectively improve the response speed of the fuel stop protection, the motor and the reversing valve 30 are synchronously controlled by an engine control unit (ECU). That is, when the engine control unit receives the engine stop signal, it sends instructions to the motor and the reversing valve 30 at the same time, so that the motor is turned on to drive the auxiliary oil pump 20, and the reversing valve 30 switches the working position so that the second oil outlet 32 open. It is thus possible to respond quickly and easily to a signal to stop the engine.

As another preferred embodiment of the present utility model, as shown in Figure 6 and Figure 8, the supercharger lubrication system also includes a backup oil pump 21 and an oil pressure sensor 40, the oil pressure sensor 40 is located at the reversing valve 30 and the auxiliary oil pump 20, the third oil outlet 33 of the reversing valve 30 communicates with the main oil passage 10 through the backup oil pump 21, in other words, the backup oil pump 21 and the auxiliary oil pump 20 In parallel connection, when the oil pressure monitored by the oil pressure sensor 40 is higher than a predetermined value, the standby oil pump 21 is turned on.

Specifically, in this preferred embodiment, as shown in FIG. 7 , the reversing valve 30 may be a three-position, four-way reversing valve, but the utility model is not limited thereto. The three-position four-way reversing valve has an oil inlet and three switchable oil outlets, namely a first oil outlet 31 , a second oil outlet 32 and a third oil outlet 33 . Wherein the oil inlet of reversing valve 30 links to each other with the oil outlet of supercharger 11 all the time, and the first oil outlet 31 of reversing valve 30, the second oil outlet 32 and the third oil outlet 33 are in any case Only one of them can be opened, and the rest are closed, so that the supercharger 11 can be selectively communicated with the crankcase 12, the auxiliary oil pump 20 or the backup oil pump 21.

Therefore, when the auxiliary oil pump 20 is blocked suddenly during the working process, the oil pressure sensor 40 can feed back the blockage to the engine control unit, and the engine control unit will issue instructions to control the third oil outlet of the reversing valve 30. 33 is opened, and all the other closures are driven by the starter motor to work with the spare oil pump 21 simultaneously.

Further, in order to ensure that after the auxiliary oil pump 20 is blocked, it can continue to provide lubrication and cooling for the supercharger 11, the auxiliary oil pump 20 and the backup oil pump 21 are respectively driven by a motor, that is, the auxiliary oil pump 20 and the backup oil pump 21 is driven by two different motors, so that after the auxiliary oil pump 20 is blocked, the motor can drive the backup oil pump 21 to work, thereby promoting the oil to circulate in the closed lubricating oil circuit to continue cooling and lubricating the supercharger 11.

Further, in order to quickly switch the working position of the solenoid valve to control the opening and closing of the first oil outlet 31 , the second oil outlet 32 and the third oil outlet 33 , the reversing valve 30 is a solenoid valve.

Further, the motor and the reversing valve 30 are synchronously controlled by the engine control unit. Therefore, when the auxiliary oil pump 20 is blocked, the engine control unit gives commands to the reversing valve 30 and the motor simultaneously according to the signal transmitted by the oil pressure sensor 40 located on the branch of the auxiliary oil pump 20, so that the third of the reversing valve 30 The oil outlet 33 is opened, and at the same time, the motor driving the auxiliary oil pump 20 is turned off, and the motor driving the standby oil pump 21 is turned on.

Finally, the utility model also provides an engine, which includes the above-mentioned turbocharger lubricating system.

The preferred embodiment of the utility model has been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the specific details of the above-mentioned embodiment, and within the scope of the technical concept of the utility model, the technical solution of the utility model can be carried out in many ways. These simple modifications all belong to the protection scope of the present utility model.

In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way if there is no contradiction. The combination method will not be explained separately.

In addition, any combination of various implementations of the present invention can also be made, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (9)

1. a booster lubricating system, comprise main oil gallery (10), pressurized machine (11) and crankcase (12), the filler opening of wherein said pressurized machine (11) is communicated to described main oil gallery (10), it is characterized in that, described booster lubricating system also comprises auxiliary lubricating oil pump (20) and selector valve (30), the oil outlet of described pressurized machine (11) is communicated to the filler opening of described selector valve (30), first oil outlet (31) of described selector valve (30) is communicated to described crankcase (12), second oil outlet (32) is communicated to described main oil gallery (10) by described auxiliary lubricating oil pump (20).

2. booster lubricating system according to claim 1, is characterized in that, described auxiliary lubricating oil pump (20) is driven by motor.

3. booster lubricating system according to claim 2, is characterized in that, described selector valve (30) is solenoid valve.

4. booster lubricating system according to claim 3, is characterized in that, described motor and selector valve (30) are by control unit of engine synchronization control.

5. booster lubricating system according to claim 1, it is characterized in that, described booster lubricating system also comprises guest machine oil pump (21) and oil pressure sensor (40), this oil pressure sensor (40) is positioned between described selector valve (30) and described auxiliary lubricating oil pump (20), 3rd oil outlet (33) of described selector valve (30) is communicated to described main oil gallery (10) by described guest machine oil pump (21), when the oil pressure that described oil pressure sensor (40) is monitored is higher than predetermined value, described guest machine oil pump (21) is opened.

6. booster lubricating system according to claim 5, is characterized in that, described auxiliary lubricating oil pump (20) and described guest machine oil pump (21) are driven by motor respectively.

7. booster lubricating system according to claim 6, is characterized in that, described selector valve (30) is solenoid valve.

8. booster lubricating system according to claim 7, is characterized in that, described motor and selector valve (30) are by control unit of engine synchronization control.

9. a motor, is characterized in that, this motor comprises booster lubricating system as claimed in any of claims 1 to 8.